258690 has 16 divisors (see below), whose sum is σ = 620928. Its totient is φ = 68976.

The previous prime is 258677. The next prime is 258691. The reversal of 258690 is 96852.

258690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×258690² = 133841032200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 8623 = 258690 / (2 + 5 + 8 + 6 + 9 + 0).

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 258690.

It is not an unprimeable number, because it can be changed into a prime (258691) by changing a digit.

258690 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4282 + ... + 4341.

It is an arithmetic number, because the mean of its divisors is an integer number (38808).

2²⁵⁸⁶⁹⁰ is an apocalyptic number.

258690 is an abundant number, since it is smaller than the sum of its proper divisors (362238).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

258690 is a wasteful number, since it uses less digits than its factorization.

258690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8633.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 258690 is about 508.6157685326. The cubic root of 258690 is about 63.7176691117.

The spelling of 258690 in words is "two hundred fifty-eight thousand, six hundred ninety".